基于MC和RSM的共轨喷油器一致性的参敏分析  

Analysis on Parameter Sensitivity of Fuel Injection Consistency in Common Rail Injector Based on Monte Carlo Method & RSM

作　　者：段炼[1] 胡林峰[2] 袁寿其[1] 俞建达[2] 夏兴兰[2] 王凌云[2] 

机构地区：[1]江苏大学流体机械工程技术研究中心,镇江212013 [2]中国一汽无锡油泵油嘴研究所,无锡214063

出　　处：《内燃机工程》2015年第2期132-137,144,共7页Chinese Internal Combustion Engine Engineering

基　　金：电控共轨柴油喷射系统制造技术与关键装备的研发(2011ZX04001-061)

摘　　要：采用一维数值计算结合试验设计、Monte Carlo、响应面模型等方法,分析了影响电控高压共轨喷油器的喷油一致性参数的敏感性。针对某型试验喷油器,根据多参数抽样计算,得到怠速工况的循环喷油量方差为5.11mm3,标定工况的为3.45mm3,即由理论计算剖析了前者的一致性劣于后者的试验现象。且由分析可知电磁阀衔铁最大升程、进油节流孔直径等参数对循环喷油量以及喷油启、闭延迟等性能指标的影响,其中电磁阀衔铁最大升程对标定和怠速工况的循环喷油量一致性的影响权重分别为33.7%和52.5%。The parameter sensitivity of fuel injection consistency in common rail injector was analyzed based upon one dimensional simulation in combination with DOE, Monte Carlo method and RSM. A multi- parametric sampling simulation of a tested injector not only obtained that the variance of injection is 5.11 mm^3 at idling mode and 3.45 mm^3 at rated condition, i.e. that under mass production the injection uniformity at the former is worse than at the latter, but also demonstrated the influence of maximum armature-lift of solenoid valve, diameter of inlet throttle, etc. on some performance indexes such as injection quantity, delays of injection open and close. Remarkably, the effect of armature-lift on injection quantity consistency accounts for about 33.7% at rated condition and 52.5% at idling mode.

关 键 词：内燃机 共轨 MONTE Carlo法 响应面模型 参数敏感性 定量分析 

分 类 号：TK423.8[动力工程及工程热物理—动力机械及工程]